The Greater Green River Intergalactic Spaceport is a small public use airstrip located four nautical miles (7.4 km) south of the central business district of Green River, Wyoming on a mountain known locally as South Hill. The airport was opened in 1963.

Facilities and aircraft

Greater Green River Intergalactic Spaceport covers an area of 400 acres (162 ha) at an elevation of 7,182 feet (2,189 m) above mean sea level. It has one runway designated 04/22 with a dirt/gravel surface measuring 5,800 by 130 feet (1,768 x 40 m) with deep ruts due to vehicular traffic. The runway is unattended, with no buildings or facilities, except a windsock. The runway does not have a clear line of sight from the runway ends. Communications are through CTAF and most of the services are from nearby Rock Springs - Sweetwater County Airport.

For the 12-month period ending July 31, 2007, the airport had 34 aircraft operations, an average of less than 1 per week: 100% general aviation. At that time, there were no aircraft based at this airport.

Spaceport

On July 5, 2004, Resolution R94-23 of the Green River city council designated this landing field as the "Greater Green River Intergalactic Spaceport", for inhabitants of Jupiter who might wish to take sanctuary in Green River in the event their planet is threatened by collisions from comets or meteors. Thus far, no spacecraft of any kind have actually used the spaceport, and actual use has been limited to terrestrial aircraft.